Everytime I install the PS3 Media Server I lose my wireless connection [to my router]. When this happens I then spend several hours unistalling and reinstalling the router software, driver software and basically get totally frustrated. I do not touch or chnage ANY of the settings - whatever the default settings are is what I kep.

Here are my specs and hopefully someone can help me figure out the problem before it happens again

Is there a chance that your driver software from Dell uses some type of Java implementation that conflicts with PSM or something?

Any way why do you have to install specific software for the wifi card on your dell? Do you use the windows default software or using dell specific software to connect to the wireless? If so try not installing that software but use the stock windows wifi implementation.